The Sears Tower, located in the heart of Chicago, is an “international style” design consisting of square tubes in a 3 by 3 tube arrangement, with each tube having a footprint of 23 meters (75 ft.) by 23 meters (75 ft.), in essence creating a unified bundle of nine tubes. The Sears Tower was the first building for which this type of “bundled- tubular” construction was used. This design provides stability against high winds and also allows for future upward growth if so desired. The building is supported by 114 rock caissons secured into bedrock. The foundation and the floor slabs combine to equal 2 million cubic feet of concrete. 76,000 tons of prefabricated steel frame sections measuring 15x25 ft. were put in place. The Willis Tower has more than 16,000 bronze-tinted windows and 28 acres of black aluminum cladding or “skin”. As the building climbs upward, the tubes begin to drop off giving the Sears Tower its characteristic setback or “step-back”. This geometry of the 110-story tower was developed in response to the original interior space requirements of Sears, Roebuck & Company.

· Book included with details on design and history
· 69 pieces
· Ages 10+

Department: Men's Furnishings
Style: 21000